Thibaut (the exceptional Benjamin Lavernhe, Delicious, C’est la vie!) is an internationally renowned orchestra conductor who travels the world. When a health crisis and subsequent DNA test inadvertently reveals that he was adopted as an infant, Thibaut discovers the existence of a younger brother, Jimmy (rising star Pierre Lottin), who lives in more modest circumstances; he works in a school cafeteria, cares for his mother and plays the trombone in a community brass band. The pair seem to have little else in common other than a love of performance, but sensing his sibling’s talent, Thibaut decides to remedy the injustice of fate and help nurture his brother’s gifts.